This is a note to let you know that I've just added the patch titled
ACPICA: Tables: Don't release ACPI_MTX_TABLES in acpi_tb_install_standard_table().
to the 3.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpica-tables-don-t-release-acpi_mtx_tables-in-acpi_tb_install_standard_table.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 77ddc2fe08329e375505bc36a3df3233fe57317b Mon Sep 17 00:00:00 2001
From: Octavian Purdila <octavian.purdila@xxxxxxxxx>
Date: Mon, 13 Apr 2015 11:49:05 +0800
Subject: ACPICA: Tables: Don't release ACPI_MTX_TABLES in acpi_tb_install_standard_table().
From: Octavian Purdila <octavian.purdila@xxxxxxxxx>
commit 77ddc2fe08329e375505bc36a3df3233fe57317b upstream.
ACPICA commit c70434d4da13e65b6163c79a5aa16b40193631c7
ACPI_MTX_TABLES is acquired and released by the callers of
acpi_tb_install_standard_table() so releasing it in the function itself is
causing the following error in Linux kernel if the table is reloaded:
ACPI Error: Mutex [0x2] is not acquired, cannot release (20141107/utmutex-321)
Call Trace:
[<ffffffff81b0bd48>] dump_stack+0x4f/0x7b
[<ffffffff81546bf5>] acpi_ut_release_mutex+0x47/0x67
[<ffffffff81544357>] acpi_load_table+0x73/0xcb
Link: https://github.com/acpica/acpica/commit/c70434d4
Signed-off-by: Octavian Purdila <octavian.purdila@xxxxxxxxx>
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/acpica/tbinstal.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -346,7 +346,6 @@ acpi_tb_install_standard_table(acpi_phys
*/
acpi_tb_uninstall_table(&new_table_desc);
*table_index = i;
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(AE_OK);
}
}
Patches currently in stable-queue which might be from octavian.purdila@xxxxxxxxx are
queue-3.19/acpica-tables-don-t-release-acpi_mtx_tables-in-acpi_tb_install_standard_table.patch
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